Release 4.10 fs/nfsd/nfsfh.c

/*
 * NFS server file handle treatment.
 *
 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
 * Portions Copyright (C) 1999 G. Allen Morris III <gam3@acm.org>
 * Extensive rewrite by Neil Brown <neilb@cse.unsw.edu.au> Southern-Spring 1999
 * ... and again Southern-Winter 2001 to support export_operations
 */

#include <linux/exportfs.h>

#include <linux/sunrpc/svcauth_gss.h>
#include "nfsd.h"
#include "vfs.h"
#include "auth.h"


#define NFSDDBG_FACILITY		NFSDDBG_FH


/*
 * our acceptability function.
 * if NOSUBTREECHECK, accept anything
 * if not, require that we can walk up to exp->ex_dentry
 * doing some checks on the 'x' bits
 */


static int nfsd_acceptable(void *expv, struct dentry *dentry)
{
	struct svc_export *exp = expv;
	int rv;
	struct dentry *tdentry;
	struct dentry *parent;

	if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
		return 1;

	tdentry = dget(dentry);
	while (tdentry != exp->ex_path.dentry && !IS_ROOT(tdentry)) {
		/* make sure parents give x permission to user */
		int err;
		parent = dget_parent(tdentry);
		err = inode_permission(d_inode(parent), MAY_EXEC);
		if (err < 0) {
			dput(parent);
			break;
		}
		dput(tdentry);
		tdentry = parent;
	}
	if (tdentry != exp->ex_path.dentry)
		dprintk("nfsd_acceptable failed at %p %pd\n", tdentry, tdentry);
	rv = (tdentry == exp->ex_path.dentry);
	dput(tdentry);
	return rv;
}

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neil brown
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33.33%
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al viro
33
21.15%
3
33.33%
jan blunck
jan blunck
9
5.77%
1
11.11%
david howells
david howells
3
1.92%
1
11.11%
andrew morton
andrew morton
1
0.64%
1
11.11%
Total
156
100.00%
9
100.00%

/* Type check. The correct error return for type mismatches does not seem to be
 * generally agreed upon. SunOS seems to use EISDIR if file isn't S_IFREG; a
 * comment in the NFSv3 spec says this is incorrect (implementation notes for
 * the write call).
 */

static inline __be32

nfsd_mode_check(struct svc_rqst *rqstp, struct dentry *dentry,
		umode_t requested)
{
	umode_t mode = d_inode(dentry)->i_mode & S_IFMT;

	if (requested == 0) /* the caller doesn't care */
		return nfs_ok;
	if (mode == requested) {
		if (mode == S_IFDIR && !d_can_lookup(dentry)) {
			WARN_ON_ONCE(1);
			return nfserr_notdir;
		}
		return nfs_ok;
	}
	/*
         * v4 has an error more specific than err_notdir which we should
         * return in preference to err_notdir:
         */
	if (rqstp->rq_vers == 4 && mode == S_IFLNK)
		return nfserr_symlink;
	if (requested == S_IFDIR)
		return nfserr_notdir;
	if (mode == S_IFDIR)
		return nfserr_isdir;
	return nfserr_inval;
}

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j. bruce fields
57
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2
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neil brown
53
47.32%
1
20.00%
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al viro
2
1.79%
2
40.00%
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112
100.00%
5
100.00%



static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
					  struct svc_export *exp)
{
	int flags = nfsexp_flags(rqstp, exp);

	/* Check if the request originated from a secure port. */
	if (!test_bit(RQ_SECURE, &rqstp->rq_flags) && !(flags & NFSEXP_INSECURE_PORT)) {
		RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
		dprintk("nfsd: request from insecure port %s!\n",
		        svc_print_addr(rqstp, buf, sizeof(buf)));
		return nfserr_perm;
	}

	/* Set user creds for this exportpoint */
	return nfserrno(nfsd_setuser(rqstp, exp));
}

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j. bruce fields
74
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3
60.00%
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jeff layton
7
8.14%
1
20.00%
pavel emelianov
pavel emelianov
5
5.81%
1
20.00%
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86
100.00%
5
100.00%



static inline __be32 check_pseudo_root(struct svc_rqst *rqstp,
	struct dentry *dentry, struct svc_export *exp)
{
	if (!(exp->ex_flags & NFSEXP_V4ROOT))
		return nfs_ok;
	/*
         * v2/v3 clients have no need for the V4ROOT export--they use
         * the mount protocl instead; also, further V4ROOT checks may be
         * in v4-specific code, in which case v2/v3 clients could bypass
         * them.
         */
	if (!nfsd_v4client(rqstp))
		return nfserr_stale;
	/*
         * We're exposing only the directories and symlinks that have to be
         * traversed on the way to real exports:
         */
	if (unlikely(!d_is_dir(dentry) &&
		     !d_is_symlink(dentry)))
		return nfserr_stale;
	/*
         * A pseudoroot export gives permission to access only one
         * single directory; the kernel has to make another upcall
         * before granting access to anything else under it:
         */
	if (unlikely(dentry != exp->ex_path.dentry))
		return nfserr_stale;
	return nfs_ok;
}

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steve dickson
87
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david howells
2
2.25%
1
50.00%
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89
100.00%
2
100.00%

/*
 * Use the given filehandle to look up the corresponding export and
 * dentry.  On success, the results are used to set fh_export and
 * fh_dentry.
 */


static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
{
	struct knfsd_fh	*fh = &fhp->fh_handle;
	struct fid *fid = NULL, sfid;
	struct svc_export *exp;
	struct dentry *dentry;
	int fileid_type;
	int data_left = fh->fh_size/4;
	__be32 error;

	error = nfserr_stale;
	if (rqstp->rq_vers > 2)
		error = nfserr_badhandle;
	if (rqstp->rq_vers == 4 && fh->fh_size == 0)
		return nfserr_nofilehandle;

	if (fh->fh_version == 1) {
		int len;

		if (--data_left < 0)
			return error;
		if (fh->fh_auth_type != 0)
			return error;
		len = key_len(fh->fh_fsid_type) / 4;
		if (len == 0)
			return error;
		if  (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
			/* deprecated, convert to type 3 */
			len = key_len(FSID_ENCODE_DEV)/4;
			fh->fh_fsid_type = FSID_ENCODE_DEV;
			/*
                         * struct knfsd_fh uses host-endian fields, which are
                         * sometimes used to hold net-endian values. This
                         * confuses sparse, so we must use __force here to
                         * keep it from complaining.
                         */
			fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]),
							ntohl((__force __be32)fh->fh_fsid[1])));
			fh->fh_fsid[1] = fh->fh_fsid[2];
		}
		data_left -= len;
		if (data_left < 0)
			return error;
		exp = rqst_exp_find(rqstp, fh->fh_fsid_type, fh->fh_fsid);
		fid = (struct fid *)(fh->fh_fsid + len);
	} else {
		__u32 tfh[2];
		dev_t xdev;
		ino_t xino;

		if (fh->fh_size != NFS_FHSIZE)
			return error;
		/* assume old filehandle format */
		xdev = old_decode_dev(fh->ofh_xdev);
		xino = u32_to_ino_t(fh->ofh_xino);
		mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
		exp = rqst_exp_find(rqstp, FSID_DEV, tfh);
	}

	error = nfserr_stale;
	if (PTR_ERR(exp) == -ENOENT)
		return error;

	if (IS_ERR(exp))
		return nfserrno(PTR_ERR(exp));

	if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) {
		/* Elevate privileges so that the lack of 'r' or 'x'
                 * permission on some parent directory will
                 * not stop exportfs_decode_fh from being able
                 * to reconnect a directory into the dentry cache.
                 * The same problem can affect "SUBTREECHECK" exports,
                 * but as nfsd_acceptable depends on correct
                 * access control settings being in effect, we cannot
                 * fix that case easily.
                 */
		struct cred *new = prepare_creds();
		if (!new) {
			error =  nfserrno(-ENOMEM);
			goto out;
		}
		new->cap_effective =
			cap_raise_nfsd_set(new->cap_effective,
					   new->cap_permitted);
		put_cred(override_creds(new));
		put_cred(new);
	} else {
		error = nfsd_setuser_and_check_port(rqstp, exp);
		if (error)
			goto out;
	}

	/*
         * Look up the dentry using the NFS file handle.
         */
	error = nfserr_stale;
	if (rqstp->rq_vers > 2)
		error = nfserr_badhandle;

	if (fh->fh_version != 1) {
		sfid.i32.ino = fh->ofh_ino;
		sfid.i32.gen = fh->ofh_generation;
		sfid.i32.parent_ino = fh->ofh_dirino;
		fid = &sfid;
		data_left = 3;
		if (fh->ofh_dirino == 0)
			fileid_type = FILEID_INO32_GEN;
		else
			fileid_type = FILEID_INO32_GEN_PARENT;
	} else
		fileid_type = fh->fh_fileid_type;

	if (fileid_type == FILEID_ROOT)
		dentry = dget(exp->ex_path.dentry);
	else {
		dentry = exportfs_decode_fh(exp->ex_path.mnt, fid,
				data_left, fileid_type,
				nfsd_acceptable, exp);
	}
	if (dentry == NULL)
		goto out;
	if (IS_ERR(dentry)) {
		if (PTR_ERR(dentry) != -EINVAL)
			error = nfserrno(PTR_ERR(dentry));
		goto out;
	}

	if (d_is_dir(dentry) &&
			(dentry->d_flags & DCACHE_DISCONNECTED)) {
		printk("nfsd: find_fh_dentry returned a DISCONNECTED directory: %pd2\n",
				dentry);
	}

	fhp->fh_dentry = dentry;
	fhp->fh_export = exp;
	return 0;
out:
	exp_put(exp);
	return error;
}

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neil brown
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10
27.03%
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pre-git
224
32.89%
5
13.51%
j. bruce fields
j. bruce fields
76
11.16%
6
16.22%
christoph hellwig
christoph hellwig
46
6.75%
3
8.11%
david howells
david howells
38
5.58%
3
8.11%
kendrick m. smith
kendrick m. smith
21
3.08%
2
5.41%
linus torvalds
linus torvalds
11
1.62%
2
5.41%
jeff layton
jeff layton
9
1.32%
1
2.70%
kinglong mee
kinglong mee
8
1.17%
1
2.70%
jan blunck
jan blunck
6
0.88%
1
2.70%
al viro
al viro
5
0.73%
3
8.11%
Total
681
100.00%
37
100.00%

/**
 * fh_verify - filehandle lookup and access checking
 * @rqstp: pointer to current rpc request
 * @fhp: filehandle to be verified
 * @type: expected type of object pointed to by filehandle
 * @access: type of access needed to object
 *
 * Look up a dentry from the on-the-wire filehandle, check the client's
 * access to the export, and set the current task's credentials.
 *
 * Regardless of success or failure of fh_verify(), fh_put() should be
 * called on @fhp when the caller is finished with the filehandle.
 *
 * fh_verify() may be called multiple times on a given filehandle, for
 * example, when processing an NFSv4 compound.  The first call will look
 * up a dentry using the on-the-wire filehandle.  Subsequent calls will
 * skip the lookup and just perform the other checks and possibly change
 * the current task's credentials.
 *
 * @type specifies the type of object expected using one of the S_IF*
 * constants defined in include/linux/stat.h.  The caller may use zero
 * to indicate that it doesn't care, or a negative integer to indicate
 * that it expects something not of the given type.
 *
 * @access is formed from the NFSD_MAY_* constants defined in
 * fs/nfsd/vfs.h.
 */

__be32

fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
{
	struct svc_export *exp;
	struct dentry	*dentry;
	__be32		error;

	dprintk("nfsd: fh_verify(%s)\n", SVCFH_fmt(fhp));

	if (!fhp->fh_dentry) {
		error = nfsd_set_fh_dentry(rqstp, fhp);
		if (error)
			goto out;
	}
	dentry = fhp->fh_dentry;
	exp = fhp->fh_export;
	/*
         * We still have to do all these permission checks, even when
         * fh_dentry is already set:
         *      - fh_verify may be called multiple times with different
         *        "access" arguments (e.g. nfsd_proc_create calls
         *        fh_verify(...,NFSD_MAY_EXEC) first, then later (in
         *        nfsd_create) calls fh_verify(...,NFSD_MAY_CREATE).
         *      - in the NFSv4 case, the filehandle may have been filled
         *        in by fh_compose, and given a dentry, but further
         *        compound operations performed with that filehandle
         *        still need permissions checks.  In the worst case, a
         *        mountpoint crossing may have changed the export
         *        options, and we may now need to use a different uid
         *        (for example, if different id-squashing options are in
         *        effect on the new filesystem).
         */
	error = check_pseudo_root(rqstp, dentry, exp);
	if (error)
		goto out;

	error = nfsd_setuser_and_check_port(rqstp, exp);
	if (error)
		goto out;

	error = nfsd_mode_check(rqstp, dentry, type);
	if (error)
		goto out;

	/*
         * pseudoflavor restrictions are not enforced on NLM,
         * which clients virtually always use auth_sys for,
         * even while using RPCSEC_GSS for NFS.
         */
	if (access & NFSD_MAY_LOCK || access & NFSD_MAY_BYPASS_GSS)
		goto skip_pseudoflavor_check;
	/*
         * Clients may expect to be able to use auth_sys during mount,
         * even if they use gss for everything else; see section 2.3.2
         * of rfc 2623.
         */
	if (access & NFSD_MAY_BYPASS_GSS_ON_ROOT
			&& exp->ex_path.dentry == dentry)
		goto skip_pseudoflavor_check;

	error = check_nfsd_access(exp, rqstp);
	if (error)
		goto out;

skip_pseudoflavor_check:
	/* Finally, check access permissions. */
	error = nfsd_permission(rqstp, exp, dentry, access);

	if (error) {
		dprintk("fh_verify: %pd2 permission failure, "
			"acc=%x, error=%d\n",
			dentry,
			access, ntohl(error));
	}
out:
	if (error == nfserr_stale)
		nfsdstats.fh_stale++;
	return error;
}


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j. bruce fields
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9
36.00%
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43
18.30%
4
16.00%
neil brown
neil brown
23
9.79%
4
16.00%
steve dickson
steve dickson
18
7.66%
1
4.00%
andy adamson
andy adamson
16
6.81%
1
4.00%
al viro
al viro
5
2.13%
3
12.00%
kendrick m. smith
kendrick m. smith
2
0.85%
1
4.00%
david howells
david howells
1
0.43%
1
4.00%
miklos szeredi
miklos szeredi
1
0.43%
1
4.00%
Total
235
100.00%
25
100.00%

/*
 * Compose a file handle for an NFS reply.
 *
 * Note that when first composed, the dentry may not yet have
 * an inode.  In this case a call to fh_update should be made
 * before the fh goes out on the wire ...
 */


static void _fh_update(struct svc_fh *fhp, struct svc_export *exp,
		struct dentry *dentry)
{
	if (dentry != exp->ex_path.dentry) {
		struct fid *fid = (struct fid *)
			(fhp->fh_handle.fh_fsid + fhp->fh_handle.fh_size/4 - 1);
		int maxsize = (fhp->fh_maxsize - fhp->fh_handle.fh_size)/4;
		int subtreecheck = !(exp->ex_flags & NFSEXP_NOSUBTREECHECK);

		fhp->fh_handle.fh_fileid_type =
			exportfs_encode_fh(dentry, fid, &maxsize, subtreecheck);
		fhp->fh_handle.fh_size += maxsize * 4;
	} else {
		fhp->fh_handle.fh_fileid_type = FILEID_ROOT;
	}
}

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christoph hellwig
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72.09%
2
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19
14.73%
1
12.50%
neil brown
neil brown
10
7.75%
2
25.00%
linus torvalds
linus torvalds
4
3.10%
2
25.00%
jan blunck
jan blunck
3
2.33%
1
12.50%
Total
129
100.00%
8
100.00%

/*
 * for composing old style file handles
 */


static inline void _fh_update_old(struct dentry *dentry,
				  struct svc_export *exp,
				  struct knfsd_fh *fh)
{
	fh->ofh_ino = ino_t_to_u32(d_inode(dentry)->i_ino);
	fh->ofh_generation = d_inode(dentry)->i_generation;
	if (d_is_dir(dentry) ||
	    (exp->ex_flags & NFSEXP_NOSUBTREECHECK))
		fh->ofh_dirino = 0;
}

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david howells
7
10.29%
2
50.00%
neil brown
neil brown
1
1.47%
1
25.00%
Total
68
100.00%
4
100.00%



static bool is_root_export(struct svc_export *exp)
{
	return exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root;
}

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1
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static struct super_block *exp_sb(struct svc_export *exp)
{
	return exp->ex_path.dentry->d_sb;
}

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4.55%
1
50.00%
Total
22
100.00%
2
100.00%



static bool fsid_type_ok_for_exp(u8 fsid_type, struct svc_export *exp)
{
	switch (fsid_type) {
	case FSID_DEV:
		if (!old_valid_dev(exp_sb(exp)->s_dev))
			return 0;
		/* FALL THROUGH */
	case FSID_MAJOR_MINOR:
	case FSID_ENCODE_DEV:
		return exp_sb(exp)->s_type->fs_flags & FS_REQUIRES_DEV;
	case FSID_NUM:
		return exp->ex_flags & NFSEXP_FSID;
	case FSID_UUID8:
	case FSID_UUID16:
		if (!is_root_export(exp))
			return 0;
		/* fall through */
	case FSID_UUID4_INUM:
	case FSID_UUID16_INUM:
		return exp->ex_uuid != NULL;
	}
	return 1;
}


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static void set_version_and_fsid_type(struct svc_fh *fhp, struct svc_export *exp, struct svc_fh *ref_fh)
{
	u8 version;
	u8 fsid_type;
retry:
	version = 1;
	if (ref_fh && ref_fh->fh_export == exp) {
		version = ref_fh->fh_handle.fh_version;
		fsid_type = ref_fh->fh_handle.fh_fsid_type;

		ref_fh = NULL;

		switch (version) {
		case 0xca:
			fsid_type = FSID_DEV;
			break;
		case 1:
			break;
		default:
			goto retry;
		}

		/*
                 * As the fsid -> filesystem mapping was guided by
                 * user-space, there is no guarantee that the filesystem
                 * actually supports that fsid type. If it doesn't we
                 * loop around again without ref_fh set.
                 */
		if (!fsid_type_ok_for_exp(fsid_type, exp))
			goto retry;
	} else if (exp->ex_flags & NFSEXP_FSID) {
		fsid_type = FSID_NUM;
	} else if (exp->ex_uuid) {
		if (fhp->fh_maxsize >= 64) {
			if (is_root_export(exp))
				fsid_type = FSID_UUID16;
			else
				fsid_type = FSID_UUID16_INUM;
		} else {
			if (is_root_export(exp))
				fsid_type = FSID_UUID8;
			else
				fsid_type = FSID_UUID4_INUM;
		}
	} else if (!old_valid_dev(exp_sb(exp)->s_dev))
		/* for newer device numbers, we must use a newer fsid format */
		fsid_type = FSID_ENCODE_DEV;
	else
		fsid_type = FSID_DEV;
	fhp->fh_handle.fh_version = version;
	if (version)
		fhp->fh_handle.fh_fsid_type = fsid_type;
}

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20.09%
2
14.29%
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15
7.01%
2
14.29%
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steve dickson
15
7.01%
1
7.14%
al viro
al viro
10
4.67%
1
7.14%
bruce allan
bruce allan
6
2.80%
1
7.14%
kendrick m. smith
kendrick m. smith
3
1.40%
1
7.14%
linus torvalds
linus torvalds
3
1.40%
1
7.14%
Total
214
100.00%
14
100.00%


__be32

fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
	   struct svc_fh *ref_fh)
{
	/* ref_fh is a reference file handle.
         * if it is non-null and for the same filesystem, then we should compose
         * a filehandle which is of the same version, where possible.
         * Currently, that means that if ref_fh->fh_handle.fh_version == 0xca
         * Then create a 32byte filehandle using nfs_fhbase_old
         *
         */

	struct inode * inode = d_inode(dentry);
	dev_t ex_dev = exp_sb(exp)->s_dev;

	dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %pd2, ino=%ld)\n",
		MAJOR(ex_dev), MINOR(ex_dev),
		(long) d_inode(exp->ex_path.dentry)->i_ino,
		dentry,
		(inode ? inode->i_ino : 0));

	/* Choose filehandle version and fsid type based on
         * the reference filehandle (if it is in the same export)
         * or the export options.
         */
	set_version_and_fsid_type(fhp, exp, ref_fh);

	if (ref_fh == fhp)
		fh_put(ref_fh);

	if (fhp->fh_locked || fhp->fh_dentry) {
		printk(KERN_ERR "fh_compose: fh %pd2 not initialized!\n",
		       dentry);
	}
	if (fhp->fh_maxsize < NFS_FHSIZE)
		printk(KERN_ERR "fh_compose: called with maxsize %d! %pd2\n",
		       fhp->fh_maxsize,
		       dentry);

	fhp->fh_dentry = dget(dentry); /* our internal copy */
	fhp->fh_export = exp_get(exp);

	if (fhp->fh_handle.fh_version == 0xca) {
		/* old style filehandle please */
		memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE);
		fhp->fh_handle.fh_size = NFS_FHSIZE;
		fhp->fh_handle.ofh_dcookie = 0xfeebbaca;
		fhp->fh_handle.ofh_dev =  old_encode_dev(ex_dev);
		fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
		fhp->fh_handle.ofh_xino =
			ino_t_to_u32(d_inode(exp->ex_path.dentry)->i_ino);
		fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
		if (inode)
			_fh_update_old(dentry, exp, &fhp->fh_handle);
	} else {
		fhp->fh_handle.fh_size =
			key_len(fhp->fh_handle.fh_fsid_type) + 4;
		fhp->fh_handle.fh_auth_type = 0;

		mk_fsid(fhp->fh_handle.fh_fsid_type,
			fhp->fh_handle.fh_fsid,
			ex_dev,
			d_inode(exp->ex_path.dentry)->i_ino,
			exp->ex_fsid, exp->ex_uuid);

		if (inode)
			_fh_update(fhp, exp, dentry);
		if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
			fh_put(fhp);
			return nfserr_opnotsupp;
		}
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
j. bruce fields
j. bruce fields
103
26.89%
2
8.00%
linus torvalds
linus torvalds
101
26.37%
1
4.00%
pre-git
pre-git
83
21.67%
4
16.00%
neil brown
neil brown
28
7.31%
7
28.00%
christoph hellwig
christoph hellwig
20
5.22%
2
8.00%
al viro
al viro
14
3.66%
3
12.00%
david howells
david howells
12
3.13%
1
4.00%
kendrick m. smith
kendrick m. smith
11
2.87%
1
4.00%
jan blunck
jan blunck
6
1.57%
1
4.00%
andrew morton
andrew morton
3
0.78%
1
4.00%
namjae jeon
namjae jeon
1
0.26%
1
4.00%
kinglong mee
kinglong mee
1
0.26%
1
4.00%
Total
383
100.00%
25
100.00%

/*
 * Update file handle information after changing a dentry.
 * This is only called by nfsd_create, nfsd_create_v3 and nfsd_proc_create
 */

__be32

fh_update(struct svc_fh *fhp)
{
	struct dentry *dentry;

	if (!fhp->fh_dentry)
		goto out_bad;

	dentry = fhp->fh_dentry;
	if (d_really_is_negative(dentry))
		goto out_negative;
	if (fhp->fh_handle.fh_version != 1) {
		_fh_update_old(dentry, fhp->fh_export, &fhp->fh_handle);
	} else {
		if (fhp->fh_handle.fh_fileid_type != FILEID_ROOT)
			return 0;

		_fh_update(fhp, fhp->fh_export, dentry);
		if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
			return nfserr_opnotsupp;
	}
	return 0;
out_bad:
	printk(KERN_ERR "fh_update: fh not verified!\n");
	return nfserr_serverfault;
out_negative:
	printk(KERN_ERR "fh_update: %pd2 still negative!\n",
		dentry);
	return nfserr_serverfault;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
72
53.73%
6
40.00%
linus torvalds
linus torvalds
32
23.88%
2
13.33%
neil brown
neil brown
12
8.96%
1
6.67%
j. bruce fields
j. bruce fields
9
6.72%
1
6.67%
christoph hellwig
christoph hellwig
3
2.24%
1
6.67%
david howells
david howells
3
2.24%
1
6.67%
al viro
al viro
2
1.49%
2
13.33%
namjae jeon
namjae jeon
1
0.75%
1
6.67%
Total
134
100.00%
15
100.00%

/*
 * Release a file handle.
 */

void

fh_put(struct svc_fh *fhp)
{
	struct dentry * dentry = fhp->fh_dentry;
	struct svc_export * exp = fhp->fh_export;
	if (dentry) {
		fh_unlock(fhp);
		fhp->fh_dentry = NULL;
		dput(dentry);
		fh_clear_wcc(fhp);
	}
	fh_drop_write(fhp);
	if (exp) {
		exp_put(exp);
		fhp->fh_export = NULL;
	}
	return;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
42
53.85%
7
58.33%
neil brown
neil brown
25
32.05%
1
8.33%
jan kara
jan kara
5
6.41%
1
8.33%
jeff layton
jeff layton
3
3.85%
1
8.33%
kendrick m. smith
kendrick m. smith
2
2.56%
1
8.33%
stanislav kinsbursky
stanislav kinsbursky
1
1.28%
1
8.33%
Total
78
100.00%
12
100.00%

/*
 * Shorthand for dprintk()'s
 */


char * SVCFH_fmt(struct svc_fh *fhp)
{
	struct knfsd_fh *fh = &fhp->fh_handle;

	static char buf[80];
	sprintf(buf, "%d: %08x %08x %08x %08x %08x %08x",
		fh->fh_size,
		fh->fh_base.fh_pad[0],
		fh->fh_base.fh_pad[1],
		fh->fh_base.fh_pad[2],
		fh->fh_base.fh_pad[3],
		fh->fh_base.fh_pad[4],
		fh->fh_base.fh_pad[5]);
	return buf;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
andrew morton
andrew morton
96
100.00%
1
100.00%
Total
96
100.00%
1
100.00%



enum fsid_source fsid_source(struct svc_fh *fhp)
{
	if (fhp->fh_handle.fh_version != 1)
		return FSIDSOURCE_DEV;
	switch(fhp->fh_handle.fh_fsid_type) {
	case FSID_DEV:
	case FSID_ENCODE_DEV:
	case FSID_MAJOR_MINOR:
		if (exp_sb(fhp->fh_export)->s_type->fs_flags & FS_REQUIRES_DEV)
			return FSIDSOURCE_DEV;
		break;
	case FSID_NUM:
		if (fhp->fh_export->ex_flags & NFSEXP_FSID)
			return FSIDSOURCE_FSID;
		break;
	default:
		break;
	}
	/* either a UUID type filehandle, or the filehandle doesn't
         * match the export.
         */
	if (fhp->fh_export->ex_flags & NFSEXP_FSID)
		return FSIDSOURCE_FSID;
	if (fhp->fh_export->ex_uuid)
		return FSIDSOURCE_UUID;
	return FSIDSOURCE_DEV;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
neil brown
neil brown
106
97.25%
2
66.67%
j. bruce fields
j. bruce fields
3
2.75%
1
33.33%
Total
109
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
neil brown
neil brown
726
26.39%
20
19.23%
j. bruce fields
j. bruce fields
650
23.63%
23
22.12%
pre-git
pre-git
507
18.43%
13
12.50%
linus torvalds
linus torvalds
212
7.71%
6
5.77%
christoph hellwig
christoph hellwig
165
6.00%
4
3.85%
steve dickson
steve dickson
120
4.36%
2
1.92%
andrew morton
andrew morton
101
3.67%
3
2.88%
al viro
al viro
72
2.62%
9
8.65%
david howells
david howells
66
2.40%
4
3.85%
kendrick m. smith
kendrick m. smith
39
1.42%
5
4.81%
jan blunck
jan blunck
24
0.87%
1
0.96%
jeff layton
jeff layton
19
0.69%
3
2.88%
andy adamson
andy adamson
19
0.69%
1
0.96%
kinglong mee
kinglong mee
9
0.33%
2
1.92%
bruce allan
bruce allan
6
0.22%
1
0.96%
pavel emelianov
pavel emelianov
5
0.18%
1
0.96%
jan kara
jan kara
5
0.18%
1
0.96%
namjae jeon
namjae jeon
2
0.07%
1
0.96%
boaz harrosh
boaz harrosh
1
0.04%
1
0.96%
oleg drokin
oleg drokin
1
0.04%
1
0.96%
miklos szeredi
miklos szeredi
1
0.04%
1
0.96%
stanislav kinsbursky
stanislav kinsbursky
1
0.04%
1
0.96%
Total
2751
100.00%
104
100.00%
Directory: fs/nfsd

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